I used Vinegar when I started using peps.It worked fine but stung a little so now I just use the saline that comes in a spray can that you can find at any drug store. It is .09% sodium chloride saline solution. Ive used and reconstituted hgh, igf lr3 and DES, CJC's, GHRP's, MTII, and other peps with this and it works great. Peps are stored in refridgerator before and after reconstitution.